<?php

echo "hello world  I belive everything is  possible  belive yourself and just do it  ";
// echo phpinfo()
// exit;断点调试
echo "<h1>我</h1>";
// die;断点调试
echo $a;
$name="张三";
$age=20;



?>
<h1>你</h1>
<li>姓名是<?php echo $name ?><br>年龄是<?php echo $age ?></li>